The Uruguayan came off the bench on Saturday to score Boro’s late match-winner against Oxford.

The League One side recovered from a 2-0 half-time deficit to dramatically draw level thanks to two goals in the space of a minute.

A replay looked the likely outcome until Stuani , a 71st minute replacement for Adama Traore, scored from close-range to fire Boro into the quarter-finals of the FA Cup.

The Uruguayan has made a useful habit of scoring vital goals, netting in the promotion-clinching draw against Brighton last season and scoring a brace in what’s now looking like a priceless 2-1 away win at Sunderland in August.

Reflecting on Stuani’s goal against Oxford, Karanka said: “It was really important and for me maybe it is a shame he is not recognised for how good he is and how much he is helping us.

“His numbers (statistics) since he arrived here have been amazing.

“And not just the numbers but also the moments he contributes.

“Against Oxford he appears in the most difficult moment (and scores) and in the game against Brighton, he scored the most important goal, so for me it’s a shame that he’s not recognised as much as he deserves.”